亚洲地区Benioff应变释放和强震活动的周期性特征研究

Abstract

Abstract: In this study, Benioff strain release and the cyclical characteristics of strong earthquake(M_W>8.0) activities since 1900 in the Asian region are investigated based on the mixed catalogue of the Centennial Catalogue edited by Engdahl and Villasenor and the global CMT catalogue. Temporal Benioff strain release using earthquake with M_W≥6.9, cumulative Benioff strain linear deviation using different source depths of earthquakes and periodic Rydelek-Sacks test for M_W>8.0 earthquake activity are analyzed, respectively. The results show that there is an aproximate 30 years or less fluctuation of strength in the Benioff strain release; cumulative Benioff strain linear deviation has different cyclical activities, 40 years for deep earthquakes and longer active for shallow earthquakes; and there is a 33±2 years of cyclical activity of M_W>8.0 strong earthquakes. As a result of extrapolation, Asian region might be in a strong earthquake activity in the next 10 years, occurring in the third stage of the 1990 to 2020 cycle. The level of strain release will be lower than that from 2000 to 2010, and aproximately the same level with the period from 1990 to 2000.

Key words: Strong earthquake activity, Benioff strain, Periodic characteristics, Rydelek-Sacks test, Asia region

CLC Number:

P315.7

JIANG Chang-sheng, ZHAO Yi-zhe, WANG Xing-zhou. Benioff Strain Release and Periodic Characteristics of Strong Earthquake Activities in Asia[J]. EARTHQUAKE, 2010, 30(3): 72-80.

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Benioff Strain Release and Periodic Characteristics of Strong Earthquake Activities in Asia

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